C Programming Questions and Answers – Relational & Logical Operators – 2

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This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Relational & Logical Operators – 2”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

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1. Are logical operator sequence points?
a) True
b) False
c) Depends on the compiler
d) Depends on the standard
View Answer

Answer: a
Explanation: None.

2. Do logical operators in the C language are evaluated with the short circuit?
a) True
b) False
c) Depends on the compiler
d) Depends on the standard
View Answer

Answer: a
Explanation: None.
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3. What is the result of logical or relational expression in C?
a) True or False
b) 0 or 1
c) 0 if an expression is false and any positive number if an expression is true
d) None of the mentioned
View Answer

Answer: b
Explanation: None.

4. What will be the final value of d in the following C code?

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  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int a = 10, b = 5, c = 5;
  5.         int d;
  6.         d = b + c == a;
  7.         printf("%d", d);
  8.     }

a) Syntax error
b) 1
c) 5
d) 10
View Answer

Answer: b
Explanation: None.
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5. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int a = 10, b = 5, c = 3;
  5.         b != !a;
  6.         c = !!a;
  7.         printf("%d\t%d", b, c);
  8.     }

a) 5 1
b) 0 3
c) 5 3
d) 1 1
View Answer

Answer: a
Explanation: None.
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6. Which among the following is NOT a logical or relational operator?
a) !=
b) ==
c) ||
d) =
View Answer

Answer: d
Explanation: None.

7. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int a = 10;
  5.         if (a == a--)
  6.             printf("TRUE 1\t");
  7.         a = 10;
  8.         if (a == --a)
  9.             printf("TRUE 2\t");
  10.     }

a) TRUE 1
b) TRUE 2
c) TRUE 1  TRUE 2
d) Compiler Dependent
View Answer

Answer: d
Explanation: This is a sequence point problem and hence the result will be implementation dependent.

8. Relational operators cannot be used on ____________
a) structure
b) long
c) strings
d) float
View Answer

Answer: a
Explanation: None.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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